Rubber crumbles are a base layer under astroturf. Thus a very large number of hig h school fields have astroturf and rubber crumbles. On pro-football broadcas

Rubber crumbles are a base layer under astroturf. Thus a very large number of hig h school fields have astroturf and rubber crumbles. On pro-football broadcasts, you can occasionally see clouds of rubber dust during a tackle.